The regular representation of every Neretin group is factorial, yielding the first non-discrete simple group whose von Neumann algebra is a factor.
Random matrices, amalgamated free products and subfactors of the von Neumann algebra of a free group, of noninteger index
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The regular representation of Neretin groups is factorial
The regular representation of every Neretin group is factorial, yielding the first non-discrete simple group whose von Neumann algebra is a factor.